Damping railway car truck
US4265182A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 2, 1979 |
| Grant date | May 5, 1981 |
| Priority date | — |
| Expiry date | Jul 2, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61F5/122
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
In a railway car truck a lower transom extends between transversely spaced side frames. The side frames include depressed portions having transversely aligned vertical openings or slots which receive spring groups. A bolster including a center connection extends between the side frames above the transom and rests on the spring groups. The side frames each include a hollow post extending upwardly between the spring groups. The bolster includes a depending post which surrounds the side frame post. A friction damping assembly including upper and lower wedges is located within the side frame post and the bolster post. The upper and lower wedges include rear wear plates which engage the side frame post. The upper and lower wedges include an opening to receive a spring extending upwardly from the side frame depressed portion. The lower wedge has at least one inclined surface which slidingly engages at least one inclined surface on the upper wedge. The upper surface of the upper wedge engages the lower surface of the bolster. Oscillations of the spring group and bolster are damped by the rear wear surfaces forced outwardly by the inclines of the upper and lower wedges as the bolster moves…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.